Summit SI-90
The Summit SI-90 is a scientific calculator with 10 digits precision and algebraic logic. It has 20 functions, 36 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is Sealed battery pack.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Scientific |
| Functions | 20 |
| Keys | 36 |
| Precision | 10 |
| Logic | Algebraic |
| Display type | LED |
| Length | 203mm |
| Width | 83mm |
| Thickness | 38mm |
| Power Source | Sealed battery pack |
| Year introduced | 1974 |
| Year discontinued | 1974 |
Replacements:
If you have a Summit SI-90 that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: